Paper receptacle.



A. MOORE.

PAPER RECEPTACLE.

APPLICATION FILED JUNE 3. 1916.

Patented Jan. 8, 1918.

INVENTOR fat ARLINGTON MOORE, 0F NEWARK, NEW JERSEY.

PAPER RECEPTACLE.

Specification of Letters Patent.

Patented Jan. 8, 1918.

Application filed .Tune 3, 1916. Serial No. 101,490.

To all whom it may concern:

Be it known that I, ARLINGTON MOORE, a citizen of the United States, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Paper Receptacles, of which the following is a specification.

My invention relates to paper receptacles designed for the purpose of serving as a ackage for food products and the like, and it has for its object the improvement of devices of this character in numerous important respects as hereinafter pointed out.

With these and related ob ects in view my invention consists in the parts, improvements and combinations herein set forth and claimed.

The accompanying drawing forming part of this specification is a view half in elevation and half in central vertical cross-section of one form of paper receptacle embodying my. invention.

Referring to the top portion of the receptacle shown in said drawing, reference numeral 1 is applied to designate the lid which is preferably of paper and is preferably of the form of a simple flat disk preferably circular in outline, which form of lid, combining the advantages of strength and cheapness and simplicity, has thus farbeen found to give best results in devices of this character.

Contrary to what is ordinarily to be expected in devices of this sort, my experience has indicated that with such a lid as described it is necessary, to secure effective results, to make the receptacle to fit the lid, this by reason of the fact that when the lids are cut in large quantities, preferably by means of dies, while they may be obtained of substantially uniform diameter, nevertheless there is a considerable practical variation by reason of numerous elements which are necessarily involved, including, for example, the heat and cold expansion of the cutting apparatus and the heat and cold and dryness and moisture expansion and contraction of the paper stock both before and after the lids have been cut. As these various conditions, or the greater part of them, are practically not under control and the lids therefore vary minutely but nevertheless substantially in size, and in order to secure a successful receptacle, provision must be made to take care of this variation by the construction of the receptacle itself.

The receptacle wall is indicated by the reference numeral 2, and the receptacle, while it may be of any form, preferably is tub-shaped and flares toward the top so as to present, generally speaking, the form of a frustum of a cone. While any kind of paper which will stand up may be utilized, 1 preferably make use of a paper of pulp, such as wood pulp, and preferably in the uncalendered state, that is, without its having been subjected to such high degree of pressure as to give it a smooth calendered surface and .a hard and firmly fixed set. Such calendering as the paper is subjected to is given to it in the formation of the receptacle body in accordance with the pres ent invention.

In accordance with established practice I prefer to form an outwardly extending flange 3 in the receptacle wall toward the upper portion thereof, this having two advantageous features. First, it gives a moderate amount of stiffening effect to this portion of the receptacle, and secondly and most important, it permits nesting the receptacle bodies, with or without the bottoms therein in one another, and prevents the entry of receptacles into the adjacent receptacles in which they are received to such extent as to cause them to grip or bind. The receptacles so nested can be readily separated.

Referring now to the top portion of the receptacle, the reference numeral 4 indicates a broad, outwardly extending bead which may be formed on the receptacle body near its upper margin and opposite the region where the lid edge is to be received, 5

represents an internal annular recess formed in the single thickness portion of the wall 2 in which the lid edge is received, 6 represents a similar, but preferably shallower annular, recess below the recess 5. The outwardly extending bead 4, however, may be dispensed with if preferred. When such bead 4 is provided both said recesses 5 and 6 are formed opposite the outwardly extending bead 4. 7 represents an inwardly extending shoulder upon which the lid 1 is received, and which shoulder may be somewhat more marked when the outer bead f is provided, the formation of such head 4: serving to direct or concentrate the material from the recesses 5 and 6 so as to assist in forming a broader shoulder at 7 than would otherwise be scoured. Reference numeral 8 indicates the inturned portion of the body margin and 9 indicates an outwardly extending or offset thickened portion provld- -ing an upper outwardly extending and thickened rim. Reference numerals 10 and 11 represent thinned or highly calendered portions of the body formed to give added resiliency and springiness to the region of the receptacle wherein the edgesof the lid 1 are received. 12 represents the flange or corner for holding the lid firmly in place, and 13 the smooth conical wall provided for facilitating the insertion of the lid when the package is filled. The hook-like flange 12 is also better defined and more effective in operation when the head 4 is formed on the outside of the receptacle.

The parts just referred to are important for a number of reasons. Referring first to the thinned portions 10 and 11 and the lidreceiving groove 5 formed in the single thickness wall of the material. By such a construction the needed flexibility of the container at the lid edge receiving region may be obtained and the receptacle may be expanded fairly considerably upon insertion of the lid and will spring together and hold the inserted lid firmly.

The inwardly extending shoulder on which the lid rests affords a supporting means for the lid and a stop for preventing its insertion too far into the receptacle when the lid is put in place after the receptacle is filled. In the formation of the receptacle it is, of course, received in a female die and is expanded by an interior male die or dies and the expanding pressure is necessarily substantially all outward. It is because of these considerations that the single broad outwardly extending bead is desirable and the two comparatively narrow, interior recesses 5 and 6 are formed both opposite the outward head 4. WVith such arrangement it becomes possible to permit the paper stock, which, as stated, is an uncalendered pulp, to enter a recess in the male die provided for that purpose and to form the very substantial shoulder 7 extending interiorly .immediately beneath the lid receiving recess 5 and providing a substantially broad flat upper or top face on which the lid is supported. The formation of the annular recess 6, in addition to furnishing material for the shoulder 7 also serves to thin the material somewhat at the neighborhood 11 and to add to the resiliency and flexibility and lid fittin qualities of the receptacle body, this resi iency and flexibility and conformability being also due to an extent to the thin portion 10' immediately above the bead 4, the parts intermediate the regions 10 and 11 being capable of inward and out- Ward movement upon insertion or removal of the lid upon the thinned parts 10 and 11,

substantially as upon hinges provided for this purpose. The inwardy extending or slight marginal flange 12 at the base of the smooth conical region 13 serves effectively to hold the lid in place.

Above the lid 1 the body portion 9 is expanded outwardly, preferably substantially as shown, in a recess in the female dieprovided for that purpose, and the margin 8 is inturned against the portion 9, the male die being preferably smooth and forming, when the receptacle is finished, the smooth wall 13 for the ready insertion of the lid. There are a number of considerations which are of importance in connection with this construction. In the first place, as has already been stated, this portion of the receptacle above the upper margin is severely calendered in the manufacture of the receE- I tacle and given a hard surface and a su stantially permanent set so that the parts, when removed from the dies, present a very good appearance and retain the shape and conformation given them in the process of manufacture. The inturning of the margin 8 and the forcible pressure and calendering of the parts together by rotating dies affords an extra thickness at the top margin and at the same time gives a smooth and even contour even where the body walls are lapped over one another as indicated at 14, the obtaining of this result being. assisted by reason of the fact that the material used is preferably an uncalendered pulp and that the same is preferably moistened somewhat before being submitted to the action of forming dies, so that the parts 8 and 9, when otherwise securing the lapped edges together, and that as a result. of such small variations the extent to which the body will enter the die will vary slightly with each receptacle body, and consequently'the depth of the turn-over 8 will vary in a related manner so that the edge 8 may be either slightly above or below the precise point shown in the drawing. By expanding the turned overmargin with the top portion the receptacle is complete, form substanof the body into the recess in the forming die, as represented by the reference numeral 9, and firmly calendering it in place therein, the particles of the pulp in the two thicknessesinterlace or intermingle more or less and any slight variation in the quantity and thickness of material presented is readily taken care of. Again it is to be noted that the inturned margin 8 does not extend down beyond the edge of the disk lid 1, as hereto- I inturned margin extends down into the body of the receptacle beyond the lid, and the space between the margin and body is in contact with the contents of the receptacle, there is a sort of capillary tendency for the watery contents of the receptacle to be drawn up into the space between the lid and 7 severely pressed into an outwardly extend-.

ing groove automatically takes up any slight excess or lack of material, the severe calendering of the stock into place gives it a permanent set and therefore a substantially uniform diameter for receiving the lid edge, the interior is smoothly calendered as at 13, permitting the lid to be readily inserted in place, and there being no inward extension of the inturned margin of such character that an edge is presented to the contents, there is no capillary or other admission of watery contents of the receptacle into the space between the body and the turned over margin, and there is quite a substantial saving in paper stock over a receptacle in which the turned over margin extends downwardly within the receptacle to below the lid.

Referring now to the bottom of the receptacle, the bottom 15 is of substantially the same form as the lid 1, except that it may be thinner and it is provided with a downwardly extending peripheral margin 16 which is received between the lower portion 17 of the Vessel wall 2 and the inwardly and upwardly turned portion 18 thereof. So received, the parts are firmly compressed together and in the region 19 adjacent to the lower part of the body 15 and a slight distance from the bottom edge 20 of the completed vessel, relatively excessive pressure is applied in a narrow region so as to further press the part 18 outwardly and to compress the three thicknesses presented in such region vcry firmly and strongly together, giving them a permanent set so that the bottom is retained firmly and strongly in place with a knitting together of the materials as already explained with reference to the top end of the receptacle. It will be noted that 'tions referred to.

course, be dispensed with when not needed.

here as at the top of the receptacle, provision is automatically made for taking care of any slight irregularities either in the diameter of thebottom 15, the width of the flange 16, or the stock of the receptacle itself which may vary somewhat in thickness and may be slightly wider or slightly narrower at the bottom edge in the same manner as has already been explained at the top edge. The parts 16 and 18 lapping over one another for a considerable interval, if there is any excessive material it is readily taken care of in the extreme compression and calendering to which the parts are subjected. If there should be, as may be possible, a slight lack of material, the lap of the parts 16 and 19 is ample to compensate therefor and still secure a tight well fitting bottom joint. The lower margin 20 is likewise submitted to severe pressure and receives a sharp edged smooth outline substantially as shown and afiording a very fiat, smooth bottom for the receptacle to rest on without any tilting or cantin of the receptacle, as would result from lrregularity in the bottom marginal outline of the vessel.

If desired, as when the vessel is, to be filled with heavy materials or materials which may ferment or otherwise produce gaseous pressure or when rough handling of the filled container is to be expected, or when the contents may be desired to be kept in the vessel for an unusually great time, or for any other reason it is necessary to take extra precautions to insure that the lid remain tightly in place, a metallic reinforcing means as a wire'ring 21 may be placed about the vessel immediately above the lid, as in the depression at the top of the outer head 4. While such ring will readily give sufliciently with the paper inside it to enable the insertion of the lid, the reinforcing action obtained is such as to prevent the lid leaking or loosening under the various condi- The ring 21 may, of

The wire ring 21 when used may readily he slipped on from the bottom or may be applied in any other preferred manner.

For use for containing materials having a water content the receptacle is preferably thoroughly coated with a suitable waxy material such as parafiin in accordance with established practice.

Having thus described my invention, 1 claim 1. In a paper receptacle, a body having its upper margin doubled over inwardly to form a reinforced portion, said body having a single thickness below said reinforced portion andprovided in the single thickness wall with an annular groove for receiving the lid, the reinforced portion being expanded outwardly and being calendered smooth on its interior, and the reinforced portion and the adjacent single thickness portion together forming a smooth interior wall for leading a lid into the groove, substantially as set forth.

2. In a paper receptacle, an all paper body having an annular groove for receiving the lid, a second annular groove below the firstnamed groove, and a lid supporting shoulder between said grooves and having a substantially broad fiat upper face on which the lid is adapted to rest, substantially as set forth.

3. In a paper receptacle, an all paper body having an annular groove for receiving the lid, a second annular groove below and shallower than the first-named groove, and a lid supporting shoulder between said grooves and having a substantially broad flat upper face on which the lid is adapted to rest, substantially as set forth.

4. In a paper receptacle, an all paper body having a broad exteriorly projecting head, a pair of internal grooves formed in the interior of the wall opposite said bead, and a lid supporting shoulder between said grooves and having a substantially broad fiat upper face on which the lid is adapted to rest, substantially as set forth.

5. In a paper receptacle, an all paper body having a broad exteriorly projecting bead, a pair of internal grooves formed in the interior of the wall opposite said bead, the

vlower groove being shallower and of less diameter than the upper one, and a lid supporting shoulder between said grooves, substantially as set forth.

6. In a paper receptacle, an all paper body having a reinforced outwardly projecting upper marginal portion and being of a single thickness below said reinforced portion and having in the single thickness wall a pair of separated substantially parallel an- 'nular grooves, and an inwardly extending shoulder between said grooves for supporting the lid received in the upper grooves, substantially as set forth.

7. In a paper receptacle, an all paper body having a stiffened and reinforced top marginal portion and being of a single thickness below said reinforced part and having in the single thickness wall an annular groove for receiving the lid, said wall being thinned and compressed above and below said lid receiving groove to impart a spring action to the wall in the neighborhood of the lid receiving groove, substantially as set forth.

8. In a paper receptacle, an all paper body having its upper margin turned inwardly, said doubled portion being expanded outwardly to provide a smooth inner wall, the body being of a single thickness below said reinforced portion and having an annular groove in said single thickness portion for receiving the lid, said smooth Wall of the reinforced part and the single thickness part leading smoothly and-directly to said lid receiving groove, substantially as set forth. 9. In a paper receptacle, an all paper body having its top portion turned inwardly and the double thickness portion so provided calendered together and expanded outwardly, and having a broad outwardly extending bead below said double thickness reinforced portion, a pair of annular grooves and an intermediate shoulder on the interior of the body wall opposite said bead, the body walls being calendered and thinned at each of the edges of the outwardly extending bead to give the body an inwardly springing tendency at the lid receiving. groove, substantially as set forth.

10. In a paper receptacle, an all paper body having its top portion turned inwardly and the double thickness portion so provided calendered together and expanded outwardly, and having a broad outwardly extending bead below said double thickness reinforced portion, a pair of annular grooves and an intermediate shoulder on the interior of the body wall opposite said bead, the body walls being calendered and thinned at each of the edges of the outwardly extending bead to give the body an inwardly springing tendency at the lid receiving recess, substantially as set forth.

In testimony that I claim the foregoing, I hereto set my hand, this 2nd day of June, 1916,.

ARLINGTON MOORE. 

